1. Gregg S. Kantor exercised an option to purchase 6,000 shares at $31.34 each and then sold 4,773 of those shares at an average price of $46.1956 each on November 7, 2011 to generate the proceeds required to purchase 1,227 shares of the Company stock. Mr. Kantor now directly or indirectly holds a total of 26,785.1492 shares in his accounts.

2. The sale of Northwest Natural Gas Company stock took place in 56 separate broker transactions occuring on November 7, 2011. The price in column 4 represents the weighted average sale price for the transactions reported on this line. The range of prices for these transactions was $46.15 - $46.23. Northwest Natural Gas Company will provide, upon request by the Commission staff or a security holder of Northwest Natural Gas Company, full information regarding the number of shares purchased or sold at each separate price.

3. Held in reporting person's account under issuer's Retirement K Savings Plan as of October 31, 2011.

4. Shares have been credited to reporting person's account under the issuer's Deferred Compensation Plan for Directors and Executives.

5. Shares held in reporting person's parent's account, with respect to which the reporting person is Power of Attorney and a potential beneficiary.

6. Held in reporting person's parent's IRA account, with respect to which the reporting person is Power of Attorney and a potential beneficiary.

9. Option was granted for 8,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 2,000 shares on each February 27, 2009 and January 1, 2010, 2011, and 2012.

10. Option was granted for 25,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 6,250 shares on each February 25, 2010 and January 1, 2011, 2012, and 2013.

11. Option was granted for 30,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 7,500 shares on each February 24, 2011 and January 1, 2012, 2013, and 2014.

12. Option was granted for 30,000 shares pursuant to Northwest Natural Gas Company's Restated Stock Option Plan (the "Plan"). The option vests in installments of 7,500 shares on each February 23, 2012 and January 1, 2013, 2014 and 2015.

Remarks:

Shawn M. Filippi, Attorney-in-Fact

11/09/2011

** Signature of Reporting Person

Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person,
see
Instruction
4
(b)(v).